Hand-operated power mechanism for small boats



A. PANN. HAND OPERATED POWER MECHANISM FOR SMALL BOATS.

Patented May 25, 1920.

. APPLICATION FILED OCTx 1, I919. 1,340,976.

3 SHEETSSHEET I.

A. PANN.

HAND OPERATED POWER MECHANISM FOR SMALL BOATS.

APPLICATION FILED OCT. I, 1919.

Patented May 25, 1920.

3 SHEETS-SHEET 2.

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A. PANN.

HAND OPERATED POWER MECHANISM FOR SMALL BOA'T'S.

APPLICATION FILED OCT- l, 1919.

' Patented May 25, 1920.

3 SHEETSSHEET 3- UNITED STATES AUGUST PANN, OF BROOKLYN, NEW YORK.

HAND-OPERATED PO'WER MECHANISM FOR SMALL BOATS.

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Application filed October 1, 1919.

To all whom it may concern it known that 1, AUGUST PANN, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Hand- Operated Power Mechanism for Boats, of which the following is a specification.

The object of my invention is to provide a simple and effective hand-operated mechaism for driving the propeller shaft of small boats. A preferred embodiment of my improvement is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the mechanism as installed on a boat;

Fig. 2 is a plan view of a portion of the mechanism, the section being taken approximately on line 2-2 of Fig. 1, with the large gear-wheel omitted;

Fig. 3 is an end view of Fig. 1, looking from right to left;

Fig. e1 is a plan view of the driving gear connections shown in Fig. 1;

Fig. 5 is a perspective view showing the framework on which the driving gears are mounted in a position removed from the supporting baseboard, the gears and shaft and other parts being omitted for the sake of clearness.

Referring to Fig. l, a suitable baseboard or bedplate 1 is properly secured to the bottom 2 of the boat. A front board or plate 3 supports the front end of the bedplate 1 at the correct height, which, of course, will vary in the case of different boats where the mechanism is to be installed.

I is preferable that the board 3 be readily removable so that boards of different heights may be substituted as the occasion demands.

On the bed-plate 1 are mounted two angle-. irons 4 and 5, as best shown in Fig. 5. These angle-irons or bars are fixed parallel and are spaced to receive the framework which is indicated as a whole by F. This framework may be constructed in any convenient way. In the drawings the framework is shown as built of angle-irons comprising two longitudinal top bars 6, a pair of transverse top bars 6, four upright bars numbered respectively 7, 8, 9 and 10, and two bottom bars 11. On the top bars 6 are mounted the alined bearings 12, in which is journaled the transverse shaft 18. On this shaft is fixed the large gear 14. To the Specification of Letters Patent.

Small Patented May 25, 1920.

Serial No. 327,771.

outer ends of the shaft 18 are fixed the cranks 15, preferably arranged at an angle of less than 180 in respect to each other to avoid dead centers. At their free ends the cranks 15 are pivotally connected with the links 16, which are carried by the two hand-levers 17. I The cranks 15 are pivotally connected to the links 16 by bolts or pins 18, and the links 16 are pivotally connected to the hand-levers 17 by bolts or pins 19. The hand-levers 17 are pivoted at their lower ends on the shaft or bearing-pin 20, mounted inthe openings 21 of the bracket 22, which is fixed to the framework F. At their upper ends the levers 17 are provided with suitable handles 28, by means of which the levers are rocked back and forth. Because of the arrangement of the cranks 15, the movements of the hand-levers 17 are relatively in opposite directions, that is to say, while one lever is moved away from the operator, the other lever will at the same time be moved toward the operator. This provides an easy and convenient way for driving the large gear 14. The distance between the pivot point and the handles of the levers 17, and the pivotal connection between the links 16 and the levers 17 being near the pivot or fulcrum 20, give the operator a powerful leverage, which renders the driving ofthe gear 1 1 a comparatively easy matter.

On the bottom bars 11 of the framework F are fixed the bearings 24:, in which .is

mounted the lower transverse shaft 25. On.

this shaft are fixed the small gear 26 and the bevel gear 27. The small gear 26 is permanently in mesh. with the large gear 1-1, so that whenever the large gear lt is driven, the small gear 26 is rotated at a relatively increased speed, this speed depending upon the gear ratio of the two gears.

On the bed-plate 1 are mounted the alined bearings 28, which are preferably cast integral with the plate 29. which is rigidly secured upon the bed-plate 1. In the bearings 28 is rotatably mounted the propeller shaft 30, to the outer .or rear end of which is fixed the propeller 31. To the inner end of the propeller shaft 30 is fixed the bevel pinion 32 which is in mesh with the bevel gear 27 As the gears 26 and 27 are mounted in fixed relation to each other, the rotation of the gear 26 causes rotation of the bevel gear 27 and the movement of the latter is transmitted in increased ratio to the bevel pinion 32, and thereby to the propeller shaft 30. A fly-wheel 33 is fixed upon the propeller shaft 30 so as to rotate therewith and thereby steady and make easier the operation of the driving mechanism. It should be noted, that the flywheel and the gearing on the shaft 25 are all mounted near the bottom of the boat. This is a verydesirable arrangement, for it keeps the center of gravity of the boat downand thereby steadies the boat.

,7 The framework F with all the parts carried therebyis preferably removable. Any suitable means may be provided for holding or locking the framework to the angle-irons 4 and 5, which are mounted on the bed-plate 1. V In the drawings I have shown the angleirons a and 5 provided at their ends with two pairs of alined openings 34: and 35. The upright bars of the framework F are near their lowerends provided with two pairs of openings 36 and 37, arranged to register with the openings 34: and of the angle-irons 4 and 5. Through these pairs of alined openings pass suitable pins or keys 38. When it is desired to move the framework F, it is only necessary to pull out the pins 38, whereupon the framework is free to be lifted off the baseboard 1. i

It will be understood that when the frame- I work F islifted off the bed-plate, the connection between the bevel gear 27 and the bevel pinion 32 is automatically broken without any attention on thepart of the operator.

Similarly, when the framework is put back ineplace, the gear connection between the propeller shaft and the bevel gear 27 is automatically established. This makes it a very easy and simple matter toremove the framework and to. replace it.

The object of having theframework removable with all the parts carried'by it, is to render operation of the propeller shaft impossible when the boat is to be left idle, so that an unauthorized person could not use the boat. Furthermore, the removal of the framework and the gears mounted on it,

enables the owner of the boat to carry these parts Where they would not be exposed to weather conditions. If, for instance, the entire driving mechanism would be left out over night, the parts would soon rust in the dampness, but by removing the framework,

most of the mechanism can be carried to a dry place and kept there until needed again.

If desired, the shaft-25 carrying the gears peller shaft incapable of operation. Perthe framework F, so as to inclose the parts.

In Fig. 1 is shown a rear cover-plate 39 and a front cover-plate 40. In Fig. 5 there is indicated in dotted lines a curved topcover 41, which may be secured to the side cover-plates 42 by the connecting strips 43,

or otherwise. 7

While I have herein shown and described a specific mechanism, it will be understood that I have done so merely to describe my invention and not by way of limitation.

Having thus described my invention what 7 I claim as new and desire to secure by Letters Patent of the United States, is:

111 hand-operated power mechanism for small boats, a bed-plate secured at the bottomof the boat and extending longitudinally thereof, a pair of longitudinally alined bearings mounted in the rear section of said bedplate, a rotatable propeller shaft journaled in said bearings, a'bevel pinion fixed on the inner end of said propeller shaft, a pair of parallel fastening bars fixed on the front section of said bed-plate, a rectangularframe work mounted on top of said bed-plate, said framework comprising a pair of upper longitudinal bars, a pair of lower longitudinal bars, four corner posts and transverse connecting pieces, the lower'ends of the corner posts engaging said fastening bars, a transverse shaft rotatably mounted on said upper longitudinal bars, a large gear fixed on said upper shaft, a transverse shaft rotatably mountedon said lower longitudinal bars, a small gear fixed on said lower shaft and in mesh with said large gear, a bevel gear fixed on said lower shaft and in mesh withsaid bevel pinion, a crank fixed at oneend of said upper shaft for, manually rotating said large gear, and fastening members passing through said corner posts and said fastening bars to secure said framework in position on the bed-plate, said fastenlng members belng easily removable to permit ready removal'of the framework and all parts carried thereby from said bed-plate,

the lifting of the unfastened framework from the bed-plate automatically disconnecting the bevel gear from the bevel pinion, and

the replacing of the framework on the be'd plate tion.

In testimony whereof, I hereunto subscribemy name this 30th day of September,

' AUGUST PANN.

automatically establishing said connec- 

